/* crypto/objects/obj_xref.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 2006.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <openssl/objects.h>
#include "obj_xref.h"
#include "e_os.h"

DECLARE_STACK_OF(nid_triple)

static STACK_OF(nid_triple) *sig_app, *sigx_app;

static int sig_cmp(const nid_triple *a, const nid_triple *b)
{
    return a->sign_id - b->sign_id;
}

DECLARE_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
IMPLEMENT_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);

static int sig_sk_cmp(const nid_triple *const *a, const nid_triple *const *b)
{
    return (*a)->sign_id - (*b)->sign_id;
}

DECLARE_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);

static int sigx_cmp(const nid_triple *const *a, const nid_triple *const *b)
{
    int ret;
    ret = (*a)->hash_id - (*b)->hash_id;
    if (ret)
        return ret;
    return (*a)->pkey_id - (*b)->pkey_id;
}

IMPLEMENT_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);

int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
{
    nid_triple tmp;
    const nid_triple *rv = NULL;
    tmp.sign_id = signid;

    if (sig_app) {
        int idx = sk_nid_triple_find(sig_app, &tmp);
        if (idx >= 0)
            rv = sk_nid_triple_value(sig_app, idx);
    }
#ifndef OBJ_XREF_TEST2
    if (rv == NULL) {
        rv = OBJ_bsearch_sig(&tmp, sigoid_srt, OSSL_NELEM(sigoid_srt));
    }
#endif
    if (rv == NULL)
        return 0;
    if (pdig_nid)
        *pdig_nid = rv->hash_id;
    if (ppkey_nid)
        *ppkey_nid = rv->pkey_id;
    return 1;
}

int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
{
    nid_triple tmp;
    const nid_triple *t = &tmp;
    const nid_triple **rv = NULL;

    tmp.hash_id = dig_nid;
    tmp.pkey_id = pkey_nid;

    if (sigx_app) {
        int idx = sk_nid_triple_find(sigx_app, &tmp);
        if (idx >= 0) {
            t = sk_nid_triple_value(sigx_app, idx);
            rv = &t;
        }
    }
#ifndef OBJ_XREF_TEST2
    if (rv == NULL) {
        rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref, OSSL_NELEM(sigoid_srt_xref));
    }
#endif
    if (rv == NULL)
        return 0;
    if (psignid)
        *psignid = (*rv)->sign_id;
    return 1;
}

int OBJ_add_sigid(int signid, int dig_id, int pkey_id)
{
    nid_triple *ntr;
    if (sig_app == NULL)
        sig_app = sk_nid_triple_new(sig_sk_cmp);
    if (sig_app == NULL)
        return 0;
    if (sigx_app == NULL)
        sigx_app = sk_nid_triple_new(sigx_cmp);
    if (sigx_app == NULL)
        return 0;
    ntr = OPENSSL_malloc(sizeof(*ntr));
    if (ntr == NULL)
        return 0;
    ntr->sign_id = signid;
    ntr->hash_id = dig_id;
    ntr->pkey_id = pkey_id;

    if (!sk_nid_triple_push(sig_app, ntr)) {
        OPENSSL_free(ntr);
        return 0;
    }

    if (!sk_nid_triple_push(sigx_app, ntr))
        return 0;

    sk_nid_triple_sort(sig_app);
    sk_nid_triple_sort(sigx_app);

    return 1;
}

static void sid_free(nid_triple *tt)
{
    OPENSSL_free(tt);
}

void OBJ_sigid_free(void)
{
    sk_nid_triple_pop_free(sig_app, sid_free);
    sig_app = NULL;
    sk_nid_triple_free(sigx_app);
    sigx_app = NULL;
}

#ifdef OBJ_XREF_TEST

main()
{
    int n1, n2, n3;

    int i, rv;
# ifdef OBJ_XREF_TEST2
    for (i = 0; i < OSSL_NELEM(sigoid_srt); i++) {
        OBJ_add_sigid(sigoid_srt[i][0], sigoid_srt[i][1], sigoid_srt[i][2]);
    }
# endif

    for (i = 0; i < OSSL_NELEM(sigoid_srt); i++) {
        n1 = sigoid_srt[i][0];
        rv = OBJ_find_sigid_algs(n1, &n2, &n3);
        printf("Forward: %d, %s %s %s\n", rv,
               OBJ_nid2ln(n1), OBJ_nid2ln(n2), OBJ_nid2ln(n3));
        n1 = 0;
        rv = OBJ_find_sigid_by_algs(&n1, n2, n3);
        printf("Reverse: %d, %s %s %s\n", rv,
               OBJ_nid2ln(n1), OBJ_nid2ln(n2), OBJ_nid2ln(n3));
    }
}

#endif
